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Can anyone give me a 12MHz crystal simulation model?

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holddreams

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I want to design a 12MHz crsytal circuit,
and I need the simulation model(R,L,C,C0),
can someone give me ?

Thanks.
 

E-design

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Here's data for a 11MHz crystal that should give you starting figures to work with

LS = 0.02
CS = 1E-14
RS = 45
CO = 4E-12

Remember crystal circuits may take very long to start up in simulations due to the high loaded Q
 

    holddreams

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holddreams

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E-design said:
Here's data for a 11MHz crystal that should give you starting figures to work with

LS = 0.02
CS = 1E-14
RS = 45
CO = 4E-12

Remember crystal circuits may take very long to start up in simulations due to the high loaded Q

Thanks.
Can you tell me where you get this model?
And how can I figure it out for 12MHz?
 

E-design

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This data comes from a model in Multisim. Look at this post for information I posted on crystal models
&highlight=
 

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holddreams

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E-design said:
This data comes from a model in Multisim. Look at this post for information I posted on crystal models
&highlight=

I have the same question of the previous author.
Is the model I used be accurate as on the market crsytal?
And only using those equations to get the parameter R,L,C,C0?

THX.
 

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It depends what you mean by accurate. Most crystals needs to be trimmed individually in a circuit by external components (phase lead or phase lag to get the frequency within a few Hz of the desired frequency), even if you use crystals from the same batch. Without trimming you can expect ± 2kHz error at 11MHz. Also long term accuracy and drift will depend on type of cut, temperature and crystal dissipation from amount of drive current through RS.
 

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